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H. WATERMAN. y STOVE. No, 377,876. Patented Feb. 14, 1888.

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HENRY WATERMAN, on BROOKLYN, NEW YORK, ASSIGNOR, BY DIRECT ND M'ESNE ASSIGNMENTS, TO HIMSELF, JOHN G. r. METOALF, AND EDWARD R. GOKER, ALL OESAME PLACE.

STOVE.

SPECIFICATION forming part of Letters Patent No. 377,876, dated February 151-, 1888.

Application filed February 24. 1887. Serial No. 228,700. (No model.)

To all whom it mayconccrn:

Be it known that I, HENRY WATERMAN, of Brooklyn, in the county of Kingsand State of New York, have invented a new and useful Improvement in Stoves, of which the following is a full, clear, and exact description.

This invention relates to stoves for burning bituminous coal as fuel, and its leading object is'to produce a more perfect and economical to combustion of such fuel free from much or any escape of smoke.

The invention consists in the construction and arrangement of parts, as will be hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 represents a plan view of a stove 1 embodying my invention; Fig. 2, a vertical section of the same upon the line m x in Fig. 1;

Fig. 3, a horizontal section thereof upon the line y y in Fig. 2, and Fig. 4 a transverse section upon the line 2 z in Fig. 1.

A is the fire-chamber or furnace of the stove, and Bits grate. Said chamber is lined on three of its sides with fire-brick, but only for a short distance of its height on the remaining side, where it is open above the grate to establish communication with an attached horizontal or approximately-horizontal chamber, 0, closed on its sides, but open wholly on its inner end to the furnace. This chamber C may either be of cylindrical or any other suitable shape 3 5 in transverse section, and forms a receptacle for the coal to be fed to the furnace and to be treated by the flame and heated gases of the incandescent fuel on the grate. It is provided with an opening in its top, closed by a cover,

0 s, for charging it with the coal, D. It is also fitted with a piston or plunger, E, in front of which the coal is placed, and which serves, as the piston or follower is moved forward, to supply the burning fuel on the grate with fresh coal.

The side of the furnace opposite this chamher 0 has an upper inner projecting breast, F,

of brick, to form, in connectionwith the opposite side of the fire-chamber, a throat, b, for the purpose of concentrating the heat where the smoke and gases are burned in their at .have fresh-air inlets e, all or any of them, for

the purpose of admitting oxygen to burn the escaping gases or to assist in burning them. The breast F and throat I) also serve to concen-' trate the heat on the bank of coal, D, formed by the exposure and feed of it from the inner end of the chamber 0, to secure the desired action of the flame and heated gases upon such exposed green or fresh coal.

The follower E is moved backward or forward to charge the chamber 0 with coal or to feed coal into the fire-chamber by a screw, G, having a collared bearing in the outer end of the chamber; or a lever or rack and pinion or any other suitable mechanism may be used to move the follower. When charging the chamber (l with coal, however, care should be taken to draw the follower back, so as not to let the coal in rear of it. Said follower is adjusted forward at intervals to feed the coal to the furnace as required.

The grate B, I prefer to make up of separate longitudinal bars h, resting on suitable cross-bars, i, and projecting out through the front of the stove, so that they may be independently drawn out to pass clinkersand ashes into the ash-pit, said bars being constructed on their forward-projecting ends to receive a handle for the purpose of moving them in or out with facility; Said grate, however, may be otherwise constructed, if desired.

The operation is as follows: Kindling-wood is placed upon the grate B and the follower. E drawn back to the extreme outer end of the magazine or chamber 0. Said chamber is then half-filled (more or lesslwith coal and the follower E then moved forward until suff cient coal is discharged from said chamber to cover the wood to the extent of athin layer. The fire is then lighted. After the coal covering the wood has become well lighted, the follower E is moved forward a short distance, which will add a little more coal to the fire. When this second supply of coal has become ignited, the r00 Q e r/eve be moved forward a short distance only, so as to keep but a small or low fire on the grate. Using these precautions, a bank of coal will be formed on one side of the fire-chamber extending down from and in front of the inner open end of the chamber 0. This bank of coal thus presented to the hot fire will be dried, roasted, caked, become friable and be partly coked, and be constantly disengaging from it the vapors of water, sulphur, fine particles of carbon in the form of smoke, and hydrogen and other gases, all of which, with the exception of the vapor of water, will be burned as they pass over the hot fire and through the throat I). Simultaneously with this, small portions of the friable coal, as the bitumen burns out, will be continually dropping onto the incandescent'coal and become quickly ignited and keeping up a hot fire continuously with little or no smoke. This mode of burning the coal essentially differs from shoveling fresh coal onto hot coal in the furnace, which cools the fire to such an extent that the fine particles of carbon, sulphur, and the eliminated gases pass off without being burned, thus producing clouds of smoke and wasting a large portion of the combustible elements of fuel that usually, as the same escape, are deposited in the form of soot in or about the stove, its flues, chimney, or elsewhere. By my plan or construction the fresh coal does not come in contact with the ignited coal till it is gradually heated up to near the igniting-point, and its smoke-producing properties are vaporized and consumed in the hottest part of the furmice and throat at top of the furnace. The incandescent fuel is not cooled by the introduction of fresh coal, and a high temperature is maintained that will consume the smoke and all the inflammable vapors or gases as fast as they are eliminated.

I am aware that prior to my invention feeding-troughs open at the top and both ends have been used in connection with puddlingfurnaces and steam-boiler furnaces; also, that feeding'cylinders closed at both ends, but having a dischargeopening beneath and provided with a piston or plunger, have been used; likewise feedingspouts to stoves, arranged to pass the coal from beneath; but none of these, nor .yet any of the magazine-stoves in use, do I claim.

The invention may be applied to various kinds of cooking and other stoves.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The fire-chamber A' of the stove, provided on its one side with a horizontal hollow inwardly-projecting upper breast, F, having a longitudinal aperture, (1, leading through the sides of the stove, and transverse air outlets or perforations e, in combination with the grate B, the externally-projecting feedingchamber 0, having an open inner end and arranged on the opposite side of the fire-chamber to the breast F, the follower E within said feeding-chamber, and means for operating said follower, substantially as and for the purposes specified.

HENRY VVATERMAN.

\Vitnesses:

A. GREGORY, O. SEDGWIOK. 

